7.5

CVE-2015-1789: openssl

Modified
AliasesUBUNTU-CVE-2015-1789DEBIAN-CVE-2015-1789
Published 12-06-2015Last modified 06-08-2024

Vulnerability summary

CVE-2015-1789 is a high (CVSS 7.5) vulnerability in openssl. EPSS estimates a 75.72% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 76% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
75.72%
0%100%
Critical · +0.09 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 8
DLA-247-1DSA-3287-1MGASA-2015-0246OPENSUSE-SU-2024:10309-1OPENSUSE-SU-2024:11127-1RHSA-2015:1115

Timeline

  1. 12-06-2015
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

75.72%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

Increase +0.09 pp

From 75.63% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • openssl< 1.0.2b-1
Openssl1 product
  • opensslEOL≤ 0.9.8zf | 1.0.0 | 1.0.0:beta1 | 1.0.0:beta2 | 1.0.0:beta3 | 1.0.0:beta4 | 1.0.0:beta5 | 1.0.0a | 1.0.0b | 1.0.0c | 1.0.0d | 1.0.0e | 1.0.0f | 1.0.0g | 1.0.0h | 1.0.0i | 1.0.0j | 1.0.0k | 1.0.0l | 1.0.0m | 1.0.0n | 1.0.0o | 1.0.0p | 1.0.0q | 1.0.0r | 1.0.1 | 1.0.1:beta1 | 1.0.1:beta2 | 1.0.1:beta3 | 1.0.1a | 1.0.1b | 1.0.1c | 1.0.1d | 1.0.1e | 1.0.1f | 1.0.1g | 1.0.1h | 1.0.1i | 1.0.1j | 1.0.1k | 1.0.1l | 1.0.1m | 1.0.2 | 1.0.2:beta1 | 1.0.2a
Oracle1 product
Ubuntu1 product
  • openssl< 1.0.1f-1ubuntu2.15

4 vendors · 4 products

References

59 links
Show all 59 references